NNC 90-1170 is a modified form of a hormone, Glucagon-Like Peptide 1 (or GLP-1), which is important for controlling insulin levels. Insulin, another hormone, is also important for controlling blood glucose levels, which are higher than normal in people who have type 2 diabetes. This study will measure the effect of NNC 90-1170, active investigational drug, to cause insulin to be released from the pancreas in response to increasing blood glucose concentrations. These results will be compared to that of a group of healthy volunteers of similar age and body weight who do not have diabetes. Also, various other hormones and substances that are known to control blood sugar will be measured in blood samples that will be drawn.